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- Newsgroups: sci.engr.mech
- Path: sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!magnus.acs.ohio-state.edu!acampane
- From: acampane@magnus.acs.ohio-state.edu (Angelo Campanella)
- Subject: Re: Warm water freezes first. why?
- Message-ID: <1992Dec20.052048.22159@magnus.acs.ohio-state.edu>
- Followup-To: same
- Keywords: ice bubbles freeze time
- Sender: Angelo Campanella
- Nntp-Posting-Host: bottom.magnus.acs.ohio-state.edu
- Organization: The Ohio State University
- References: <1flklaINNg2l@usenet.INS.CWRU.Edu> <1992Dec17.162456.214@janus.arc.
- Distribution: usa
- Date: Sun, 20 Dec 1992 05:20:48 GMT
- Lines: 18
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- If the warm water is degassed via the warming, then when cooler, its thermal
- conductivity will be greter than water which may evolve some gas to become
- entrained bubbles with the attendant decrease in the effective thermal
- conductivity of the by then partly frozen cube.
-
- If this be true, then one should observe that the cold water sample will
- form the first traces of ice, but somewhere around 30% to 50% frozen,
- the cold water sample, by then containing some bubbles, will freeze more
- slowly.
-
- Meanwhile, the sample of previously hot water will remain clear of bubbles
- and proceed uniformly to become 100% frozen first.
-
- Anyone out ther witha freezer adn stopwatch??
-
- Ang.
-